The direct-cooling thermal management system is one of the feasible solutions for the future advanced thermal management system of electric vehicles, which has great potential in terms of vehicle weight reduction and temperature consistency management. Refrigerants are the critical components for di...

Multi-constellation integrated navigation can provide users with more visible satellites; however, the computational complexity of the navigation receiver will also be increased. Therefore, part visible satellites are selected instead of all visible satellites for receiver position solution, which b...

The mathematical expression of high-order mathematical homogenization method (MHM) is formulated by constructing decoupling form of each order perturbation for the thermomechanical problem of periodical composite structure, and it is converted into a matrix form by weighted residual method, which is...

Aimed at the problem that the switched reluctance motor (SRM) has large torque ripple and low operating efficiency in the commutation area, this paper proposes an SRM direct instantaneous torque control (DITC) method based on the optimal-angle-based adaptive torque sharing function (TSF). Firstrly, ...

Two-phase temperature control accumulator (hereinafter referred to as accumulator) is the key component of mechanically pumped two-phase loop (MPTL) system, which acts like the brain of MPTL system. The accumulator has the functions of storage and supplying of working fluid, gas-liquid separation an...

Image positioning is the key of UAV visual navigation. Scene matching navigation is widely used in traditional UAV visual navigation. With the continuous development of computer technology, deep learning technology provides a new way for the realization of visual navigation. In this context, this re...

Electrical impedance tomography (EIT) is an emerging method for evaluating the structural state of carbon fiber reinforced polymer (CFRP). In this paper, the structural damage detection ability of EIT is studied by applying EIT technology to commercial anisotropic CFRP laminated plates. Some damage ...

This paper focuses on the analysis and prediction of the height-velocity low-speed avoidance zone of tiltrotor based on the idea of minimizing avoidance zone, aiming at improve the safety of tiltrotor aircraft in one/all engine inoperative (OEI/AEI). First, mixed control model is introduced to estab...

Based on 0.13 μm partial depleted silicon-on-insulator (PD-SOI) process, a delay flip-flop (DFF) has been designed for single event transient (SET) pulse width, with the pulse width test range between 105 ps to 3 150 ps and the precision being ±52.5 ps. The DFF has been tested by heavy ion accelerat...

The calculation accuracy of low-speed region in high speed turbulence can be improved by modifying the compressible solver. However, it is difficult to evaluate the contribution of such modification, because simulation accuracy results from complex factors including solver type, accuracy of schemes,...

Both experimental tests and numerical simulation were implemented to investigate the strength and failure problem of carbon fiber reinforced plastics (CFRP) flat-joggle-flat (FJF) joints. Based on the commercial finite element analysis software ABAQUS, strength prediction models of the FJF joints we...

Uncertainties will make aircraft deviate from the designed aerodynamic performance, resulting in the decrease in aerodynamic performance and even destruction. Due to the problem that the probability distribution of geometric uncertainty cannot be given in engineering and nonlinear aerodynamic proble...

On-orbit maintenance is essential to maintain the safe operation of space stations in special environment of outer space. The harsh space environment and the structural characteristics of space stations determine on-orbital maintenance operation complexity (OOMOC), which is related to the optimizati...

Targeting at the difficulty of reliability analysis for electronic components with bivariate correlation accelerated degradation data, a reliability assessment method based on random correlation is proposed. The Wiener process model with random effect is used to model the marginal degradation proces...

In the process of suppressing the interference which is close to the target position, minimum variance distortionless response (MVDR) beamformer will have the mainlobe distortion problem with mismatched steering vector or larger number of elements. We use the overlapping subarray-based sin-FDA as th...

In order to solve the reentry trajectory optimization for hypersonic vehicle, a three-degree-of-freedom reentry kinematic equation considering the earth rotation was established, and a reentry constraint model was built, which took America's universal space vehicle as the object. Firstly, Legendre-G...

With respect to some inherent drawbacks regarding failure mode evaluations, risk factor weights and risk priority ranking in traditional failure mode and effect analysis (FMEA)method, an improved FMEA method based on preference ranking organization method for enrichment evaluations (PROMETHEE) in mu...

A dynamic model of a typical tri-tiltrotor UAV was established. The optimal tilt angle curve in the transition process was studied to reduce the influence of lateral coupling on longitudinal motion, and energy consumption. Based on the analysis of the influence of the tilt angle curve on the transit...

The design of the engine nacelle pressure relief door will affect the safety of the nacelle. The pressure relief is a dynamic process, which is related to the pressure inside and outside the nacelle, the freestream Mach number and the structure of the pressure relief door. Based on the Modelica lang...

Aimed at the problems of insufficient prediction accuracy and over-fitting in the fault diagnosis process of aero-engine bearing, a semi-supervised integrated learning device based on transfer learning (SSIT) is proposed to predict engine bearing fault. First, transfer learning based improved extrem...

The aerospace electric slip ring is a core component of the satellite solar battery array drive assembly. Its reliability is related to the satellite life. Due to the high cost of the space slip ring life test, the long test period and the small amount of sample data, it is difficult to obtain the l...

In order to research the working performance of the reactor in oxygen consumption based fuel tank inerting system, the solid phase energy equation was added in the form of UDS to establish the two temperatures reactor model with gas-solid two-phase coupled heat transfer on the basis of Fluent 17.0 s...

In order to effectively reduce the congestion delay and pollutant emissions of departure aircraft during peak hours in large hub airports, the design and evaluation of different taxiing strategies are carried out. Firstly, the calculation model of departure aircraft taxiing cost including environmen...

With the development of mission requirements and technologies, avionics systems continue to evolve into deep integration, and the complexity of systems has brought enormous challenges to the design and verification of networks. How to realize real-time performance guarantee of avionics information i...

In order to solve the problems of low production efficiency and frequent safety accidents in mining areas, a driverless perception and control method for mining vehicles was proposed. In the part of perception, a multi-target recognition architecture based on the fusion of lidar and millimeter-wave ...